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Electric formula race car designed for use in the FIA Formula E Championship From Wikipedia, the free encyclopedia
The Spark-Renault SRT_01E, also known as the SRT01-e (since the 2015–16 season) or the Spark Gen1 (after the introduction of the successive Gen2 chassis), was an electric formula race car designed for the inaugural season of Formula E, in 2014–15. The car was the result of a 10-month collaboration between Spark Racing Technology, McLaren Electronic Systems, Williams Advanced Engineering, Dallara and Renault.[2] The car was used until the end of Formula E's fourth season in 2018, after which it was replaced by the SRT05e.[3]
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| Category | FIA Formula E Championship |
|---|---|
| Constructor | Dallara Spark Racing Technology |
| Designer(s) | Frédéric Vasseur Théophile Gouzin (Technical Director)[1] |
| Successor | SRT05e |
| Technical specifications | |
| Chassis | Carbon fibre and aluminium monocoque |
| Suspension (front) | Double steel wishbones, pushrod operated with twin dampers and torsion bars |
| Suspension (rear) | Spring |
| Length | 5,000 mm (197 in) |
| Width | 1,800 mm (71 in) |
| Height | 1,250 mm (49 in) |
| Axle track | 1,300 mm (51 in) |
| Electric motor | McLaren Electronic Systems Motor Generator Unit mid-mounted |
| Transmission | Hewland five-speed sequential paddle-shift gearbox |
| Battery | 28kWh Li-ion by Williams Advanced Engineering |
| Power | Max power 200 kW (268 hp; 272 PS); power-saving race mode restricted to 150 kW (201 hp; 204 PS); additional push-to-pass providing 30 kW (40 hp; 41 PS) |
| Weight | 898 kg (1,980 lb) including driver (minimum weight required) |
| Tyres | Michelin |
| Competition history | |
| Notable entrants |  Amlin Aguri Andretti Autosport Audi Sport Abt China Racing Dragon Racing e.dams Mahindra Racing Trulli GP Venturi Grand Prix Virgin Racing |
Development of the car started in September 2012. Lucas di Grassi was appointed as official test driver, demonstrating the prototype, the Formulec EF01 (built in 2010).[4][5] The Formulec EF01 featured a chassis constructed by Mercedes GP and motors built by Siemens. The car was used for the official promotion video and for demonstrations in host cities.
On 1 November 2012, McLaren Electronic Systems was announced to provide the electric motor, transmission and electronics for Formula E.[6] The Formula E organisation ordered 42 cars from Spark Racing Technology. For this order Spark partnered with well renowned formula car manufacturer Dallara.[7]
Michelin was announced as an exclusive tyre-supplier on 28 March 2013. On 15 May 2013 Renault was announced as technical partner of Spark Racing Technology. Renault's experience in the Renault Z.E. (Zero Emission) and Formula One programmes will be used to put to Formula E's advantage.[8] On the same day, Formula E unveiled the design of the Spark-Renault SRT_01E.
The battery design was in the hands of Williams Advanced Engineering, part of the Williams Group to which the Formula One team belongs.[9]
At the Frankfurt Motor Show, on 10 September 2013, the Spark-Renault SRT_01E was revealed by FIA president Jean Todt and Formula E Holdings CEO Alejandro Agag.[10]
On 3 July 2014, the first official trial of the cars took place in Donington Park, England. The trial ended around 21 August with each team running all four of their cars completing a combined total of 1222 laps.[11][12] The fastest time was 1:29.920, recorded by the Abt team – a McLaren MP4-12C recorded a lap time of 1:29.679 during the 2012 British GT season.
The Spark-Renault SRT_01E featured a Rechargeable Energy Storage System (RESS). According to Appendix J article 251 3.1.7 of the ISC, the RESS is the complete energy storage device, comprising an energy storage medium (e.g. flywheel, capacitor or battery).[13] The design of the RESS is free but must be homologated by the FIA.[14] Part of the RESS is the traction batteries and the Battery Management System, these are supplied by Williams Advanced Engineering.
The electric motor is built by McLaren Electronic Technologies. The motor weighs 26 kg and produces a maximum of 270 bhp with 140Nm of instant torque. The motor was originally developed for the McLaren P1 road car.[15]
According to the regulations, the Formula E cars can be charged during practice, qualifying, the race and some other specified moments during a raceweekend.[16] Drayson Racing and its technical partner QualcommHALO are developing a way to wirelessly charge the car.[17] The wireless electric vehicle charging (WEVC) system uses a pad under a parking space to charge the car. The system is tested on the electric Drayson B12/69EV, a modified version of the Lola B08/60.[18]
The car was shod with 18-inch tyres. The FIA Formula E championship uses a tyre which is suitable for wet and dry conditions. The exclusive tyre supplier Michelin will only make one compound available, so there will be no hard or soft compounds like in Formula 1. The tyre is expected to last the whole race weekend.[19]
Maximum power will be available during practice and qualifying sessions. During races, power-saving mode will apply with the push-to-pass system temporarily allowing maximum power for a limited time. The amount of energy that can be delivered to the Motor Generator Unit (MGU) by the Rechargeable Energy Storage System (RESS) is limited to 30 kWh. This will be monitored by the FIA.
Final performance figures are still to be verified.
The Dallara built car features:
The body of the calipers must be made from aluminium alloy
The series commissioned established sim racing developer MAK-Corp to create the SRT_01E for their Hyperstimulator Simulators for use at promotional events for the series. MAK-Corp's car is not available for public use. The car also features in Turn 10 Studios' game Forza Motorsport 5, Studio 397's rFactor 2 and EA's Real Racing 3 mobile game.[22]
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